sulphides and silicates) linking up under the influence of welding stresses Lamellar tearing has a step like appearance due to the solid inclusions in the parent material (e.g.Susceptible Microstructure: Poor through thickness ductility A combination of joint design, restraint control and welding sequence to minimize the risk of cracking Use clean steel with guarantee through-thickness properties (Z grade) Two main options are available to control the problem in welded joint liable to lamellar tearing: Non-metallic inclusions are present as very thin platelets with their principal planes parallel to plate surface A thermal contraction strain occurs in the thru. LAMELLAR TEARING occurs only in rolled steel products. Cracking occurs in joints where: 5) Which of these statements are true concerning Lamellar tearing? a.Īs hydrogen levels increase Lamellar tearing is more likelyĪs material thickness increases ductility decreases making Lamellar tearing more likely
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